*{
    margin:0;
    padding:0;
}
.main-content{
    width:100%;
    height: 3000px;
    background-color: darkseagreen;
}
.slide-shell-wrap{
    position: relative;
}
.slide-shell-wrap .side-shell{
    width:700px;
    height:100%;
    position: fixed;
    top:0;
    right:0;
    overflow-y: scroll;
    border:1px solid red;
    box-sizing: border-box;

    transform: translate3d(700px, 0, 0);
    -webkit-transform: translate3d(700px, 0, 0);
    -ms-transform: translate3d(700px, 0, 0);
    -moz-transform: translate3d(700px, 0, 0);
    -o-transform: translate3d(700px, 0, 0);
    webkit-transition: 0.35s ease -webkit-transform;
    -moz-transition: 0.35s ease -moz-transform;
    -o-transition: 0.35s ease -o-transform;
    transition: 0.35s ease transform;

}
.slid-shell-content{
    width:100%;
    height:4000px;
    background-color: #dddddd;
}
.animate-show .side-shell{
    transform: translate3d(0, 0, 0);
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -moz-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    webkit-transition: 0.35s ease -webkit-transform;
    -moz-transition: 0.35s ease -moz-transform;
    -o-transition: 0.35s ease -o-transform;
    transition: 0.35s ease transform;
}
body .close-btn{
    transform: translate3d(0, 0, 0);
    -webkit-transform: translate3d(0, 0, 0);
    -ms-transform: translate3d(0, 0, 0);
    -moz-transform: translate3d(0, 0, 0);
    -o-transform: translate3d(0, 0, 0);
    webkit-transition: 0.35s ease -webkit-transform;
    -moz-transition: 0.35s ease -moz-transform;
    -o-transition: 0.35s ease -o-transform;
    transition: 0.35s ease transform;
}

.show-btn{
    width: 100px;
    height: 40px;
    line-height: 40px;
    font-size: 16px;
    text-align: center;
    position: absolute;
    left: 100px;
    top: 100px;
    background-color: red;
}
.close-btn{
    position: fixed;
    width: 100px;
    height: 40px;
    line-height: 40px;
    font-size: 16px;
    text-align: center;
    right:700px;
    top:100px;
    background-color: red;
    z-index: 10;

    transform: translate3d(100px, 0, 0);
    -webkit-transform: translate3d(100px, 0, 0);
    -ms-transform: translate3d(100px, 0, 0);
    -moz-transform: translate3d(100px, 0, 0);
    -o-transform: translate3d(100px, 0, 0);
    webkit-transition: 0.35s ease -webkit-transform;
    -moz-transition: 0.35s ease -moz-transform;
    -o-transition: 0.35s ease -o-transform;
    transition: 0.35s ease transform;
}